Setback in polio eradication in India in 2002: reasons and remedies.

Some of their observations are correct, but some observations need clarification, while some issues have been left out in the editorial. Their observations suggest inadequate vaccine coverage and non-vaccination are reasons for increase in number of polio cases in the year 2002. The authors had also indicated that OPV vaccine has not made much impact. In case OPV vaccine had made any major impact, the median age of polio cases would have moved upwards. The incidence of polio has declined, but there are three contributing factors (i) OPV vaccination, (ii) immunity provided by wild polio viruses circulating in the community and (iii) improvement in hygiene and sanitation during this period, leading to less exposure to infection.